教育资料2022年收藏的英文翻译直流供电系统

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1、DC GENERATION SYSTEM-INTRODUCTIONPurposeThe DC generation system makes a nominal 28v dc for airplane systems.GeneralThe DC generation system has these components:- Battery- Battery charger- Transformer rectifier units (3).DC GENERATION SYSTEM - GENERAL DESCRIPTIONGeneral DescriptionThe DC generation

2、 system supplies a nominal 28v dc to different loads. The power source for the DC system is usually the AC system. The battery supplies power if the AC system is not available.Transformer Rectifier UnitsTo create DC power from the normal AC source, the DC system uses transformer-rectifier units (TRU

3、s). The three TRUs take 115v ac, decrease the voltage (transforms), and rectify it to a nominal 28v dc.Battery ChargersThe main battery charger and auxiliary battery charger give a DC voltage output to charge their respective battery. Each charger operates like a TRU after the battery gets to full c

4、harge. The main battery charger sends a constant DC voltage to the battery and the hot and switched hot battery buses. The auxiliary battery and auxiliary battery charger power DC buses only during non-normal conditions. See the standby power system section for more information. (AMM PART I 24-34)Ba

5、tteriesEach battery is a 48 ampere-hour, nominal 24v dc power source. The main battery supplies power for APU starting and is a standby power source if all other power supplies do not operate. The auxiliary battery helps the main battery supply standby power only.Control and ProtectionThe standby po

6、wer control unit (SPCU), the battery switch, and the standby power switch give primary control of the DC system.The battery switch and the standby power switch give manual control of power to some DC buses. The SPCU gives automatic control and protection of DC buses. It uses inputs from the flight c

7、ompartment and system monitoring to control DC power sources and distribution.Power DistributionThe DC power distribution system is in the powerdistribution panels (PDPs) and in the SPCU.DC GENERATION SYSTEM - MAIN BATTERY CHARGER AND AUXILIARY BATTERY CHARGERPurposeThe main battery charger has thes

8、e two functions:- Keeps main battery at maximum charge- Supplies DC power to the battery buses.The auxiliary battery charger keeps the auxiliary battery at maximum charge.General DescriptionBoth battery chargers have the same part number. Each battery charger has these two basic modes of operation:-

9、 Battery charge mode (constant current)- Transformer rectifier mode (constant voltage).Each battery charger supplies constant current, variable voltage power in the battery charge mode. The battery charger overcharges the battery. The battery charger logic calculates the amount of overcharge. The to

10、tal charge time is less than 75 minutes.In the transformer rectifier (TR) mode, the main battery charger supplies constant voltage DC power to the hot battery bus and the switched hot battery bus.The main battery also receives a small trickle charge to help keep it at maximum charge. The auxiliary b

11、attery charger does not supply power to the DC buses in either mode. However, the auxiliary battery receives a small trickle charge when the auxiliary battery charger is in the TR mode. The front face of each battery charger has two green status lights (LED). One light is for the battery charger and

12、 the other is for the battery. These lights are on when the battery and battery charger are in operation.LocationThe main battery charger is on the E2 rack. The auxiliary battery charger is on the E3 rack.Functional DescriptionEach battery charger takes three-phase, 115v ac power and changes it to D

13、C power. Usually, each battery charger is in the transformer rectifier mode. The battery chargers supply a constant voltage output in this mode. Each charger can supply up to 65 amps in this mode.A battery charger goes to the charge mode when its battery voltage is less than 23v dc. In this mode, th

14、e charger supplies constant current power. The output voltage is variable. During the charge, the battery voltage rises until the voltage gets to the inflection point. The charger logic uses the battery temperature at the start of charging to calculate the inflection point. The charger logic then ca

15、lculates the length of the overcharge period.After the overcharge period, the charger goes into a transformer rectifier mode with a constant 27.5v dc output. The battery gets a trickle charge in this mode.The battery charger goes into the charge mode again if any of these occur:- Battery charger inp

16、ut power is off for more than 1 second.- Battery voltage is less than 23 volts.You use the electrical meters, battery, and galley power module to monitor the operation of each battery charger. The main battery charger is in the charge mode when you see a positive DC AMPS indication while the DC mete

17、r selector in the BAT position. Use the AUX BAT position to monitor the auxiliary battery charger.The main battery charger cannot go into the charge mode during any of these conditions:- Fueling station door open- APU start- Standby power switch (P5-5) in the BAT position- Standby power switch (P5-5

18、) in the AUTO position, battery switch ON, and DC BUS 1 and AC TRANSFER BUS1 do not have power- Main battery overheat.The auxiliary battery charger cannot go into the charge mode during any of these conditions:- Standby power switch (P5-5) in the BAT position- Standby power switch (P5-5) in the AUTO

19、 position, battery switch ON and DC BUS 1 and AC TRANSFER BUS 1 do not have power.- Auxiliary battery overheat.Status LightsBoth status lights are usually on when the battery charger has input power. A malfunction with any of these components makes one or both status lights go off:- Battery charger-

20、 Battery- Connection wiring.Both status lights are off if any of these conditions are true:- Input power to the battery charger goes away- Input voltage to the battery charger is less than 94v ac for more than 0.5 seconds.The battery charger status light is on and the battery status light is off if

21、any of these conditions are true:- Battery charger senses a loss of connection to the battery- Battery overheat- Battery temperature sensor open or shorted- Battery not charged in time limits- Battery voltage less than lower limits.The battery charger status light is off and the battery status light

22、 is on when there is an internal battery charger failure. The battery charger fail maintenance message also shows on P5-13 BITE.DC GENERATION SYSTEM-BATTERY CHARGER-FUNCTIONAL DESCRIPTIONFunctional DescriptionThe battery charger takes 3-phase, 115v ac power and changes it to dc power. Usually, the b

23、attery charger is in the transformer rectifier mode. The battery charger supplies a constant voltage output in this mode. The charger can supply up to 65 amps in this mode.The battery charger goes to the charge mode when the battery voltage goes below 23v dc. In this mode, the charger supplies const

24、ant current power. The output voltage is variable, the current output is 50 amps. During the charge, the battery voltage increases until the voltage gets to the inflection point. The charger logic uses the battery temperature at the start of charge to calculate the inflection point. The charger logi

25、c then calculates the length of the overcharge period.After the overcharge period, the charger goes into a transformer rectifier mode with a constant 27.5v dc output. The battery gets a trickle charge in this mode.The battery charger goes into the charge mode again if any of these occur:- Battery ch

26、arger input power is off for more than 1 second- Battery voltage goes below 23 volts.You use the electrical meters, battery and galley power module to monitor the operation of the battery charger.The battery charger is in the charge mode when you see a positive DC AMPS indication when the DC meter s

27、elector in the BAT position.The battery charger cannot go into the charge mode during any of these conditions:- Fueling station door open- APU start- Standby power switch (P5-5) to the BAT position- Standby power switch (P5-5) to the AUTO position, battery switch ON, and DC BUS 1 and AC TRANSFER BUS

28、 1 do not have power- Battery overheat.DC GENERATION SYSTEM - MAIN BATTERY AND AUXILIARY BATTERYPurposeThe main battery has these functions:- Supply power to critical airplane systems (AC and DC standby buses) if the normal power sources are not available- Backup power supply for the AC system contr

29、ol and protection- Power supply for APU start.The auxiliary battery helps the main battery supply power to the critical airplane systems (AC and DC standby buses).LocationThe batteries are in the EE compartment, under the E3 rack. The auxiliary battery is forward of the main battery. You remove an a

30、ccess panel in the forward cargo compartment to get access to the batteries. You must remove the main battery before you can remove the auxiliary battery.General DescriptionEach battery is a 20 cell nickel-cadmium battery with a 48 amp-hour capacity. With full charge, the batteries supply a minimum

31、of 60 minutes of standby AC and DC power.Each battery has an internal thermal sensor. The batterys charger uses this sensor to measure internal battery temperature. See the MAIN BATTERY CHARGER AND AUXILIARY BATTERY CHARGER page in this section for more information.IndicationYou can see the output o

32、f each battery on the electrical meters, battery and galley power module on the P5 forward overhead panel. You see the voltage and current output of a battery with the DC meter selector in the BAT position or AUX BAT position. If the batterys charger has power, you see the output voltage of the batt

33、ery or its battery charger, whichever is more.The amber BAT DISCHARGElight comes on when any one of these output conditions are true for either battery:- Current draw is more than 5 amps for 95 seconds- Current draw is more than 15 amps for 25 seconds- Current draw is more than 100 amps for 1.2 seco

34、nds.Master caution and the ELEC annunciator usually come on with the BAT DISCHARGE light. The light goes out when the output current goes below the limit for more than 1 second. Master caution and the ELEC annunciator do not come on during a DC power APU start.Training Information PointYou remove a

35、battery from the airplane before you do a battery inspection or servicing.DC GENERATION SYSTEM - DUAL BATTERY REMOTECONTROL CIRCUIT BREAKERPurposeThe dual battery remote control circuit breaker (RCCB) puts the output of these in parallel:- Auxiliary battery- Auxiliary battery charger- Main battery-

36、Main battery charger.LocationThe RCCB is inside the J9 junction box. J9 is in the EE compartment, in front of the E2 rack.General DescriptionThe RCCB is normally open and closes when the SPCU signals it to close. This lets the 28v dc battery bus bar receive power from the main and auxiliary batterie

37、s at the same time.DC GENERATION SYSTEM - TRANSFORMER RECTIFIER UNIT (TRU)PurposeThe transformer rectifier units (TRU) change three-phase nominal 115v ac, 400 hz input power into 28v dc to supply the main DC system loads.General DescriptionThe DC generation system has three TRUs. Each TRU can supply

38、 a continuous output load of 75 amps, with forced air cooling. The TRUs can supply 50 amps, with convection cooling.There are no external controls to the TRUs. The TRUs are the same part number.LocationThe TRUs are in the EE compartment. TRU 1 is on the E2 rack. TRU 2 and TRU 3 are on the E4 rack.In

39、dicationYou may monitor output power for each TRU from the P5-13. You can use the DC meter selector to select the TRU. TRU output voltage and amperes show in the alphanumeric display.The amber TR UNIT light comes to show a TRU failure.The light comes on for any of these conditions:- Any TRU fails on

40、 the ground- TRU 1 fails in flight- TRU 2 and TRU 3 fail in flight.DC GENERATION SYSTEM-BATTERY BUSES-FUNCTIONAL DESCRIPTIONHot Battery Bus PowerThe hot battery bus receives DC power from the battery through a 28VDC bat bus bar in the J9 battery shield.There is a circuit breaker on the SPCU that per

41、mits power to the bus.The 28v dc battery bus bar receives DC power from the main battery or the main battery charger under normal power conditions. On standby power the 28v dc battery bus bar receives power from the main battery and the auxiliary battery.Switched Hot Battery Bus PowerThe switched ho

42、t battery bus receives DC power from the 28v dc battery bus bar through a circuit breaker on the SPCU and relay K8 in the SPCU.To get power to the switched hot battery bus, the battery switch must be ON. When the battery switch is ON, K8 SW HOT BAT BUS RLY closes and gives dc power to the bus.With t

43、he forward airstair option, the K8 relay closes when the airstair handle is put in the standbyposition.The K8 relay gives DC power from the 28v dc battery bus bar to the SPCU power supply.Battery Bus PowerThe battery bus receives power from the 28v dc battery bus bar or TRU 3.The BAT BUS NORM RLY (K

44、2) is closed and gives DC power from TRU3 to the battery bus when all of these conditions are true:- BATTERY SW ON- STANDBY POWER SW not in BAT position- TRU 3 gets more than 18v dc for more than 0.15 seconds.- When the K2 relay is closed, the BAT BUS ALT RLY(K1) must be opened.The K1 BAT BUS ALT RL

45、Y is closed and gives power to the BATTERY BUS during these conditions:- Battery switch is ON and TRU 3 does not have power (less than 18v dc) for more than 0.1 seconds or- STANDBY POWER SWITCH is in the BAT position.直流电系统介绍目的 直流电系统产生28 伏直流供飞机系统。 概况 直流电系统有下列部件： 电瓶 电瓶充电器 变压整流器组件（3 ） 直流电系统概况介绍 概况介绍 直流

46、电系统给不同的负载提供正常28 伏直流电。直流系统的电源通常是交流系统。如果交流系统不适用，电瓶提供电源。 变压整流器组件 为从正常的交流电源产生直流电，直流系统使用变压整流器组件（TRU）。三个TRU将115 伏交流，降压（变压），并整流到正常28直流。 电瓶充电器 主电瓶充电器和辅助电瓶充电器产生直流电输出，并给相应电瓶充电。在电瓶得到完全充电后，每个充电器可当TRU使用。主电瓶充电器给电瓶和热电瓶及转换热电瓶汇流条提供正常直流电压。只有在非正常情况下，辅助电瓶和辅助电瓶充电器给直流汇流条供电。参见备用电源系统（AMM 第I部分2434）。电瓶 每个电瓶是一个48 安培小时，正常24伏的直

47、流电源。如果所有其他电源不工作，主电瓶给APU起动供电并作为备用电源。辅助电瓶只作为主电瓶备用电源。控制和保护 备用电源控制组件（SPCU）、电瓶电门，以及备用电源电门给直流系统提供主控制。 电瓶电门和备用电源电门对某些直流汇流条的电源进行人工控制。 SPCU 自动控制并保护直流汇流条。使用驾驶舱和系统监控的输入控制直流电源和分配。 电源分配 直流电源分配系统在配电板（PDP ）和SPCU 上。直流电系统主电瓶充电器和辅助电瓶充电器目的 主电瓶充电器有下列两个功能： 保持主电瓶在最大充电量 给电瓶汇流条提供直流电源 辅助电瓶充电器保持辅助电瓶在最大充电量。 概况介绍 两个电瓶充电器有相同的部件

48、号。每个电瓶充电器有下列两种基本使用模式： 电瓶充电模式（恒定电流） 变压整流器模式（恒定电压） 在电瓶充电模式中，每个电瓶充电器提供恒定电流，可变电压电源。电瓶充电器给电瓶完全充电。电瓶充电器逻辑计算超充量，总的充电时间少于75 分钟。 在变压整流（TR）模式下，主电瓶充电器给热电瓶汇流条和转换热电瓶汇流条提供恒压的直流电源。主电瓶也接受一些充电以保持主电瓶在最大充电量。在哪种模式下，辅助电瓶充电器也不能给直流汇流条供电。但是，当辅助电瓶充电器在 TR模式下时，辅助电瓶接受较小的充电。每个电瓶充电器的前面板上有两个绿色状态灯（LED），一个是电瓶充电器的，另一个是电瓶的。当电瓶和电瓶充电器在

49、工作时，这些灯亮。 位置 主电瓶充电器在E2架上，辅助电瓶充电器在E3架上。 功能介绍 每个电瓶充电器将三相、115 伏交流电源变成直流电源。通常，每个电瓶充电器在变压整流模式，此时，电瓶充电器提供恒定电压输出。这种模式下，每个充电器可提供最大65安培。 当电瓶电压小于23 伏直流时，电瓶充电器进入充电模式。此时，充电器提供恒定电流，输出电压是可变的。在充电期间，电瓶电压升高，直到电压达到拐点为止。在充电开始时，充电器逻辑使用电瓶温度计算拐点。然后充电器逻辑计算超量充电周期的长度。 在超量充电期间，充电器变成变压整流器模式，恒定输出27.5伏直流电压。在这种模式下电瓶进入小量充电。如果下列任何

50、情况发生，电瓶充电器再次进入充电模式： 电瓶充电器输入电源断开超过1 秒 电瓶电压小于23 伏 可以用电源仪表、电瓶和厨房电源组件监控每个电瓶充电器的使用。在直流表选择器在 BAT（电瓶）位置，发现正的直流安培时，主电瓶充电器处于充电模式。用AUX BAT（辅助电瓶）位置监控辅助电瓶充电器。 在下列任何情况下，主电瓶充电器不能进入充电模式： 加油站门打开 APU 起动 备用电源电门（P55）在BAT位置 备用电源电门（P55）在AUTO 位置，电瓶电门ON，和直流汇流条1 和交流转换汇流条1 没有电。 主电瓶过热 在下列任何情况下，主电瓶充电器不能进入充电模式： 备用电源电门（P55）在BAT

51、位置 备用电源电门（P55）在AUTO 位置，电瓶电门在ON位和直流汇流条1 和交流汇流条1 没有电 辅助电瓶过热状态灯 当电瓶充电器有输入电源时，两个状态灯通常是亮的。任何下列部件有故障，一个或两个状态灯将熄灭： 电瓶充电器 电瓶 连接导线 如果下列任何情况出现，两个状态灯都熄灭： 给电瓶充电器的输入电源消失 电瓶充电器的输入电压小于94伏交流大于0.5秒。 如果下列任何情况出现，电瓶充电器状态灯亮，而电瓶状态灯熄灭： 电瓶充电器感应到与电瓶失去联系 电瓶过热 电瓶温度传感器断开或短路 在时间限制内电瓶没充足电 电瓶电压低于低限 当电瓶充电器内有故障时，电瓶充电器状态灯熄灭，电瓶状态灯亮。并

52、在P513 BITE 上显示电瓶充电器故障维护信息。直流电系统电瓶充电器功能介绍功能介绍 电瓶充电器将三相，115 伏交流电源变成直流电源。通常，电瓶充电器处于变压整流器模式，此时电瓶充电器提供恒定电压输出。这时充电器可提供最大65安培。 当电瓶电压低于23 伏直流时，电瓶充电器进入充电模式，这种模式下，充电器提供恒定电流电源，输出电压是变化的，电流输出是50 安培。在充电期间，电瓶电压增加，直到达到拐点电压值。在充电开始时，充电器逻辑使用电瓶温度来计算拐点。然后充电器逻辑计算超充时间长度。 在超充期之后，充电器进入变压整流器模式，恒定电压27.5 伏直流。在这一模式下，电瓶可进行小量充电。

53、如果下列任何情况发生，电瓶充电器将再次进入亮电模式： 电瓶充电器输入电源断开超过1 秒钟 电瓶电压低于23 伏 用电源仪表、电瓶和厨房电源组件监控电瓶的使用。当直流仪表选择器在BAT位置，而看到正的直流安培指示时，电瓶充电器处于充电模式。 在下列任何情况下，电瓶充电器不能进入充电模式： 加油站门打开 APU起动 备用电源电门（P55）在BAT位置 备用电源电门（P55）在AUTO 位置，电瓶电门在ON位和直流汇流条1 和交流转换汇流条1 没有电。 电瓶过热 直流电系统主电瓶和辅助电瓶 目的 主电瓶有下列功能： 如果正常电源不适用，给关键的飞机系统供电（交流和直流备用汇流条） 为交流系统控制和保

54、护提供备用电源 为APU起动供电 辅助电瓶帮助电瓶给关键飞机系统（交流和直流备用汇流条）供电。 位置 电瓶位于EE舱，E3架下面。辅助电瓶位于主电瓶前面。拆下前货舱的接近面板，可接近电瓶。在拆卸辅助电瓶之前，必须拆下主电瓶。 概况介绍 每个电瓶是由20 个镍镉电池组成，有48 安培小时的容量。在完全充电情况下，电瓶最小可提供备用为交流和直流电源60 分钟。 每个电瓶都有一个内部热传感器，电瓶充电器使用这一传感器电瓶内的温度。详情参见本节的主电瓶充电器和辅助电瓶充电器。指示 在P5前头顶面板上的电源仪表、电瓶和厨房电源组件上可以监控每个电瓶的输出。在直流表选择器在BAT位置或在AUX BAT位置

55、时，可以监视电压和电流。如果电瓶充电器有电，可以监视电瓶或电瓶充电器的输出电压，这取决于哪个值更多。 当每个电瓶存在下列任一输出状态时，琥珀色的电瓶放电灯亮： 电流输出大于5 安培超过95 秒 电流输出大于15 安培25秒 电流输出大于100 安培超过1.2 秒 主告诫和ELEC 信号牌通常与电瓶放电灯一起亮。当输出电流低于限制值1 秒后，灯熄灭。在直流电源进行APU起动时，主告诫和ELEC 信号牌不亮。 培训要点 在进行电瓶检查或勤务之前，要从飞机上拆下电瓶。直流电系统双电瓶遥控电路断路器目的 双电瓶遥控电路断路器（RCCB ）将下列输出并联： 辅助电瓶 辅助电瓶充电器 主电瓶 主电瓶充电器

56、 位置 RCCB 位于J9接线盒内，J9位于EE舱，在E2架的前面。 概况介绍 正常时RCCB 是断开的，当SPCU 提供闭合信号时闭合。这使得28伏直流电瓶汇流条同时从主和辅助电瓶接受供电。直流电系统变压整流器组件（TRU） 目的 变压整流器组件（TRU）将输入的三相 115 伏交流，400 赫兹电源变成28伏直流电，供给主直流系统负载。概况介绍 直流电系统有三个TRU，在强劲空气冷却情况下，每个TRU可以提供连续输出负载75安培。在对流冷却时，TRU可以提供50安培负载。 TRU没有外部控制，且有相同的部件号。 位置 TRU在EE舱内，TRU 1在E2架上，TRU 2和TRU 3在E4架上

57、。 指示 可以从P513面板上监控每个TRU的输出电源，可用直流表选择器选择TRU，TRU的输出电压和电流显示在字母数字显示器上。 琥珀色的TR组件灯亮表示TRU故障。下列任何情况下，灯亮： 在地面上某一TRU故障 飞行中TRU 1 故障 飞行中TRU 2 和TRU 3 故障直流电系统电瓶汇流条功能介绍 热电瓶汇流条电源 通过59 电瓶屏蔽箱内的28伏直流电瓶汇流条杆，热电瓶汇流条从电瓶得到直流电源。SPCU 上有一个电路断路器可使电源到汇流条。 在电源正常的情况下，28 伏直流电瓶汇流条杆从主电瓶或主电瓶充电器得到直流电。而备用电源的28伏直流电瓶汇流条杆从主电瓶和辅助电瓶得到电源。 转换热

58、电瓶汇流条电源 通过SPCU 上的断路器和SPCU 的K8继电器，转换热电瓶汇流条从28伏直流电瓶汇流条杆得到直流电源。 为使转换热电瓶汇流条得到电源，电瓶电门必须在ON 位。此时，K8转换热电瓶汇流条继电器闭合，给汇流条提供直流电。 在选装前登机梯时，当前登机梯手柄在备用位置时，K8继电器闭合。 K8继电器将直流电源从28 伏直流电瓶汇流条杆供给SPCU 。电瓶汇流条电源 电瓶汇流条从28伏直流电瓶汇流条杆或TRU 3 得到电源。 在所有下列情况出现时，电瓶汇流条正常继电器（K2）闭合，并从TRU 3 给电瓶汇流条提供直流电： 电瓶电门在ON位 备用电源电门不在BAT位置 TRU 3 电压超过18伏直流大于0.15 秒 当K2继电器闭合时，电瓶汇流条备用 继电器（K1）必须断开 在下列情况下，K1电瓶汇流条备用继电器闭合并给电瓶汇流条供电： 电瓶电门在ON位，TRU 3没有电（低于18 伏直流）超过0.1秒或， 备用电源电门在BAT位置 12